f355berlinetta

The car runs rough at idle and sounds bad, but smooths out at higher rpms... I though it might be the distributor, so I replaced that... but it wasn't. I have replaced spark plugs, wires, and now it has a new distributor, cap and rotor, and then I figured out an injector wasn't working. So, I bought a new one and installed it, but same problem... I don't think the new injector is bad, so somehow it is not getting power. How can one injector not get power?

Mr Yamada

Typically in Honda fuel injection systems the injectors all share power at all times [key on] and it is the ECU/PCM that allows the ground path for each individual injector to activate.

If the injector is not pulsing as it should there would be a cylinder misfire code stored in the computer.

f355berlinetta

Yes, there is the misfire code, so do I have to replace the ECU/PCM?

vapor40

Borrow a noid light set, then you can check if it is getting power and pulse.

f355berlinetta

I'll try that this weekend...

f355berlinetta

The injector is getting power when I turn the key to on position. I tried measuring the voltage while running, and the voltage was fluctuating, so I think it is pulsing. I was reading some other people's problems that are exactly like mine, and it looks like it could be a burnt valve... they never posted to say exactly what fixed it, though. So, has anyone else ever heard of that?

DCFIVER

burt valve could def be the problem. Do a leak down and comp test....